The sphincter ani externus in spina bifida and myelomeningocele.
D001003:Anal Canal / Q000002:abnormalities*; D001004:Anus Diseases / Q000150:complications*; D002648:Child; D002675:Child, Preschool; D004576:Electromyography; D005260:Female; D006801:Humans; D008297:Male; D008588:Meningocele / Q000150:complications*; D009135:Muscular Diseases / Q000150:complications*; D016135:Spinal Dysraphism / Q000150:complications*; D014522:Urethral Diseases / Q000150:complications*